In reply to this post by Jonathan Wakely via llvm-dev
Nirav and I attempted this as project in university class.
I can dig some more details. Only thing I remember is that we had slightly modified the llvm to capture few examples were this can be helpful and run on LLVM's free test suite. However we did not get any example.
I think libraries which involves long and complex maths will be good candidate for this.
Also some graphics workload will also have some examples of this.